Life is too short. Grudges are a waste of perfect happiness. Laugh when you can apologize when you should and let go of what you can't change. Need to remember the grudges and letting go part more often. Hard for me to forget.
When people make you feel unwanted, don't leave to make them feel sad or guilty, they won't. Leave because you no longer have a reason to stay. Sometimes you have to be strong for yourself. What's meant to be will end up good and what's not - won't.